An item having two plane-parallel surfaces and used in the telescopic system of an optical instrument to modify the density or spectral intensity of light by absorption. Several filters having varied characteristics are usually mounted in such a manner that any selected filter may be moved in or out of the optical axis as light conditions warrant. Excludes window, optical instrument.
Classification: Military equipments not identified by kind
NSN 5835-01-141-8823
NSN 6145-01-023-7719
NSN 5935-00-146-8506
NSN 5930-01-318-2400
NSN 6645-01-014-2849
NSN 5960-01-505-2426
NSN 6105-00-479-8991
NSN 6105-01-461-9317
NSN 6645-01-114-6802
NSN 5990-01-086-4825
NSN 5910-01-486-0166
NSN 6685-00-866-4596